Brocade Communications Systems 8 Command Reference Manual page 665

Fabric OS Command Reference
53-1001764-02
This command has the following operands:
tunnel_Id Specifies the tunnel ID for the configuration change. The valid range is 0 to 7.
config Creates or modifies a FICON configuration.
delete Deletes an existing FICON configuration.
The following optional feature arguments are supported with the config and delete
options. These configurations are persistent.
-x 1|0 Enables (1) or disables (0) XRC emulation. FICON XRC Emulation allows
XRC (IBM eXtendedRemote Copy, also known as IBM z/OS Global
Mirroring) to operate effectively at extended distances.
-w 1|0 Enables (1) or disables (0) Tape Write Pipelining. This feature improves
the performance of certain applications when writing to tape over
extended distances.
-r 1|0 Enables (1) or disables (2) Tape read pipelining. This feature improves
performance for certain applications when reading from FICON tape over
extended distances.
-t 1|0 Enables or disables TIN/TIR emulation. This feature enhances recovery
when a TIN/TIR exchange occurs as part of a channel recovery operation
during tape emulation.
-l 1|0 Enables (1) or disables (0) Device Level Acknowledgement emulation.
This feature is applicable to both FICON Disk and Tape configurations.
The feature removes one network round trip for exchanges that end with
a Device Level Acknowledgement frame from the device.
-i 1|0 Enables (1) or disables (0) FICON tape read block ID. This feature permits
FICON write channel programs containing embedded read block ID
commands (Cadres) with a byte count of exactly four bytes to be
processed as emulated commands during write emulation processes.
The following optional parameter-specific arguments are supported with the config and
delete options.
-a |--wrtMaxPipe value
Defines the maximum number of tape write channel commands (CCWs)
that can enter the write pipeline for a single device whether all the CCWs
are bundled in a single channel program or in multiple channel
programs. The setting has significance only for host (channel) initiated
operations at this side and does not affect tape write operations initiated
by hosts (channels) attached at the opposite side. Too small of a value
results in poor performance. The value should be chosen based upon the
typical tape channel program that requires optimum performance. The
default value is 32. The range is 1 to 100.
-b |--rdMaxPipe value
Defines the maximum number of tape read channel commands (CCWs)
that can enter the read pipeline for a single device whether all the CCWs
are bundled in a single channel program or in multiple channel
programs. The setting has significance only for host (channel) initiated
operations at this side and does not affect tape write operations initiated
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portCfg
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